Strap for Senator Chronograph Panorama Date Stainless Steel / Silver / Calf / Pin

The lug width of the Senator 1-37-01-05-02-07 is 21mm. This measurement refers to the distance between the two horizontal pins that attach the strap to the case. This specification is consistent across all examples of this reference, regardless of production year.

We recommend alligator in dark brown or vegetable-tanned calf for the Senator 1-37-01-05-02-07. Alligator complements the case's sobriety, whilst calf develops a natural patina over time. For versatility, a pure wool NATO allows quick changes whilst maintaining elegance. Your choice should reflect intended use: formal, daily wear, or mixed.

The Senator features fixed lugs with spring bars. To change the strap: 1) obtain a spring bar tool; 2) insert the tool's tip into the slot beneath the spring bar; 3) gently lever to release the bar from the case; 4) remove the old strap; 5) align and insert the new strap; 6) reinsert the spring bar until you hear the click. We recommend having an experienced watchmaker perform this operation if you lack experience.

The Senator 1-37-01-05-02-07 accepts any strap with a 21mm lug width. Compatible materials include alligator, calf, shell cordovan, solid leather, NATO straps, and rubber. Your choice depends on personal style and usage. Milano Straps' collection offers handcrafted 21mm straps in Italian leather with customisable finishes, ready to ship.

A leather strap's lifespan depends on usage frequency, climate, and material quality. A quality alligator or calf strap, worn 3-4 days weekly, typically lasts 3-5 years before showing visible wear (micro-cracking, keeper weakening). Vegetable-tanned leather develops a prized patina, extending perceived longevity. Solid-dyed calf tends to wrinkle sooner. Storing your watch in a dry environment and rotating between straps significantly extends useful life.